But I have noticed one thing. Blowjob makes penis more aggressive. I have personal experiences. Ever since since my gf has started giving me regualr blowjobs, I have noticed incredible improvement in my energy of having sex. Besides, my penis looks lot shinier now. lol.

Where do you get these assumptions? You know if blowjob would help increase dick size, people would spent more time on stay naked and one giving other blowjob only.
Physically its not possible. Its only possible when your dick is sleeping, getting a blowjob it gets a hardon.
Doesnot mean you should stop getting or giving a blowjob, keep trying, at least can get the pleasure.